Boku No Ano Ko summary:

Amakura Chigusa has been engaged to Aki-chan since he was very young, and he’s been looking forward to marrying her his entire life, doing everything he can to become a man worthy of such a great bride as his Aki-chan. Unfortunately—he’s never met her, as their parents agreed not to let their children meet one another until they were both 16 years old. But when Aki-chan’s parents move abroad for work and she decides to stay behind in Japan, Chigusa’s family takes her in, and the future bride and groom meet one another for the first time…